mirror of
https://github.com/trezor/trezor-firmware.git
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114 lines
4.0 KiB
C
114 lines
4.0 KiB
C
/**
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* Copyright FIDO Alliance, 2017
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*
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* Licensed under CC-BY:
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* https://creativecommons.org/licenses/by/4.0/legalcode
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*
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* Editor: Jakob Ehrensvard, Yubico, jakob@yubico.com
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*/
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#ifndef __U2F_H_INCLUDED__
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#define __U2F_H_INCLUDED__
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#ifdef _MSC_VER // Windows
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typedef unsigned char uint8_t;
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typedef unsigned short uint16_t;
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typedef unsigned int uint32_t;
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typedef unsigned long int uint64_t;
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#else
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#include <stdint.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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// General constants
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#define U2F_EC_KEY_SIZE 32 // EC key size in bytes
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#define U2F_EC_POINT_SIZE ((U2F_EC_KEY_SIZE * 2) + 1) // Size of EC point
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#define U2F_MAX_KH_SIZE 128 // Max size of key handle
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#define U2F_MAX_ATT_CERT_SIZE 2048 // Max size of attestation certificate
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#define U2F_MAX_EC_SIG_SIZE 72 // Max size of DER coded EC signature
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#define U2F_CTR_SIZE 4 // Size of counter field
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#define U2F_APPID_SIZE 32 // Size of application id
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#define U2F_CHAL_SIZE 32 // Size of challenge
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#define ENC_SIZE(x) ((x + 7) & 0xfff8)
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// EC (uncompressed) point
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#define U2F_POINT_UNCOMPRESSED 0x04 // Uncompressed point format
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typedef struct __attribute__((packed)) {
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uint8_t pointFormat; // Point type
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uint8_t x[U2F_EC_KEY_SIZE]; // X-value
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uint8_t y[U2F_EC_KEY_SIZE]; // Y-value
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} U2F_EC_POINT;
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// U2F native commands
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#define U2F_REGISTER 0x01 // Registration command
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#define U2F_AUTHENTICATE 0x02 // Authenticate/sign command
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#define U2F_VERSION 0x03 // Read version string command
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#define U2F_VENDOR_FIRST 0x40 // First vendor defined command
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#define U2F_VENDOR_LAST 0xbf // Last vendor defined command
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// U2F_CMD_REGISTER command defines
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#define U2F_REGISTER_ID 0x05 // Version 2 registration identifier
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#define U2F_REGISTER_HASH_ID 0x00 // Version 2 hash identintifier
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typedef struct __attribute__((packed)) {
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uint8_t chal[U2F_CHAL_SIZE]; // Challenge
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uint8_t appId[U2F_APPID_SIZE]; // Application id
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} U2F_REGISTER_REQ;
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typedef struct __attribute__((packed)) {
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uint8_t registerId; // Registration identifier (U2F_REGISTER_ID_V2)
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U2F_EC_POINT pubKey; // Generated public key
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uint8_t keyHandleLen; // Length of key handle
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uint8_t keyHandleCertSig[
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U2F_MAX_KH_SIZE + // Key handle
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U2F_MAX_ATT_CERT_SIZE + // Attestation certificate
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U2F_MAX_EC_SIG_SIZE]; // Registration signature
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} U2F_REGISTER_RESP;
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// U2F_CMD_AUTHENTICATE command defines
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// Authentication control byte
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#define U2F_AUTH_ENFORCE 0x03 // Enforce user presence and sign
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#define U2F_AUTH_CHECK_ONLY 0x07 // Check only
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#define U2F_AUTH_FLAG_TUP 0x01 // Test of user presence set
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typedef struct __attribute__((packed)) {
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uint8_t chal[U2F_CHAL_SIZE]; // Challenge
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uint8_t appId[U2F_APPID_SIZE]; // Application id
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uint8_t keyHandleLen; // Length of key handle
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uint8_t keyHandle[U2F_MAX_KH_SIZE]; // Key handle
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} U2F_AUTHENTICATE_REQ;
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typedef struct __attribute__((packed)) {
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uint8_t flags; // U2F_AUTH_FLAG_ values
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uint8_t ctr[U2F_CTR_SIZE]; // Counter field (big-endian)
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uint8_t sig[U2F_MAX_EC_SIG_SIZE]; // Signature
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} U2F_AUTHENTICATE_RESP;
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// Command status responses
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#define U2F_SW_NO_ERROR 0x9000 // SW_NO_ERROR
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#define U2F_SW_WRONG_LENGTH 0x6700 // SW_WRONG_LENGTH
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#define U2F_SW_WRONG_DATA 0x6A80 // SW_WRONG_DATA
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#define U2F_SW_CONDITIONS_NOT_SATISFIED 0x6985 // SW_CONDITIONS_NOT_SATISFIED
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#define U2F_SW_COMMAND_NOT_ALLOWED 0x6986 // SW_COMMAND_NOT_ALLOWED
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#define U2F_SW_INS_NOT_SUPPORTED 0x6D00 // SW_INS_NOT_SUPPORTED
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#define U2F_SW_CLA_NOT_SUPPORTED 0x6E00 // SW_CLA_NOT_SUPPORTED
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#ifdef __cplusplus
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}
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#endif
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#endif // __U2F_H_INCLUDED__
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